Piano



FIG. 1 is a right side perspective view of a piano showing my new design;

FIG. 2 is a top front perspective view thereof;

FIG. 3 is a top front perspective view taken at an alternate position as seen in FIG. 2;

FIG. 4 is a front perspective view thereof with the music rack and piano cover in open position; and

FIG. 5 is a left side perspective view thereof.

The broken line showing of the piano keyboard is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a piano, as shown and described. 